you may play that card this turn mtg Three mana. Generate absurd red mana. Draw a bunch of cards. In the color that's NOT supposed to do both. In Commander, regularly makes 6+ mana AND exiles 7+ cards. For Blazing Crescendo — Rulings, Legalities

Spectacle has some good synergy with vampires, a creature tribe that often cares about whether an opponent has lost life this turn and is also found predominantly in black and red

Salvager is mostly poo as it is sorcery speed sacrifice but it can at least do artifacts as well which has its place, most notably with Pitiless Plunderer

The Eternal Wanderer does not have a planeswalker type

Like most Magic: The Gathering cards, the value of Moonshaker Cavalry depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Wilds of Eldraine)

Hearthborn Battlers real value lies in its triggered effect

Having absorbed the heart of the TARDIS, she destroys the entire Dalek fleet, protecting her beloved Doctor